Method of spacing cores



Feb. 16 1926.

4 Sheets-Sheet 1 Filed May 2. 192:5

- 11v VENTIOR TTORNE Y Feb. 16 1926. 1,573,613

R. M C. JOHNSTONE METHOD OF SPACING CORES 7 /0 Flled May 2, 19,23 4sheets-Sheet 2 Feb. 16 ,1926. 1,573,613

R. M C. JOHNSTONE METHOD OF SPAGING CORES Filed May 2, 1923 4Sheets-Sheet 5 11v VENTOR Feb. 16, 1926. 1,573,613

a Z INVENTOR cloth,

been customary to Patented Feb. 16, 1926.

UNITED STATES 1,573,613 PATENT OFFICE.

ROBER' I McC. JOHNSTONE, OF ROSELLE PARK, NEW JERSEY, ASSIGNOR T0CAMERON MACHINE COMPANY, BROOKLYN, NEW

YORK, A CORPORATION OF NEW YORK.

METHOD OF SPAQING CORES.

Application filed Kay 2,

To all whom it may concern:

Be it known that I, ROBERT MoC. OHN- a citizen of the United States, anda STONE, resident of Roselle Park, in the county of Union and State ofNew Jersey, have ina machine such as a slitting and winding machine.

In certain types of machines for slitting and winding flexible materialsuch as paper, etc. it is customary to wind the slitted material on aplurality of paper cores arranged inside by side relation on a windingshaft. It will be understood that, if overlapping of adjacentedges ofthe slitted sections of flexible material is to be avoided, the coresmust be spaced very accurately with respect to the line of severancebetween said sections; that is with respect to the slitting means. Y

In the art, as heretofore practiced, it has take a relatively long coremember or tube, then to sever it into a plurality of cores and then tomount such cores, in proper spaced relation to the slitting means, onthe winding shaft of a slit ting and winding machine. And it iscustomary for the user. of the slitting and winding machine to buy thesecores cut toa given length. Under commercial conditions, as they exist,itis not possible to obtain sufliciently accurately cut cores so thatwhen mounted'on a winding shaft they will come in register with theslitted sections of flexible material, and the result is interweaving ofadjacent rolls of rewound material.

Themain object and feature of this in-- vention is to overcome thisdifliculty and to-provide a method whereby the cores may be made toaccurately register with the slitted sections.

Accordingly the invention consists principally in a new method whereby arela tively long core member or tube is secured to a winding shaft,after which the tube is' subdivided into a group of, cores, these groupsbeing left undisturbed on the winding. shaft. Itwill be understood thatmany be employed in carry different means may mg this invention mtoeffect. For instance,

1923. Serial No. 636,133.

the subdividing of the tube into a group of cores may be done by cuttersmounted in the winding machines but, preferably, and as herein shown, aseparate core cutting machine is employed in which the winding shaft,carrying the tube, is inserted, and,

after the tube 1s cut into cores, the winding shaft with the core groupis inserted in the Fig. 2 is an end view looking in the direction ofarrow 2 of Fig. 1.

Fig. .3 is a vertical sectionalcview on the line 3-3 of Fig. 1.

Fig. 4 is a detail view, partly in section, of one end of a windingshaft with cores and coils of flexible material in position.

Fig. 5 is a detail view, partly insection,

- of a portion of a winding shaft with a tube in position before thelatter is'subdivided into sections.

Fig. 6is a perspective view of the winding shaft and core cuttingelements.

' .Fig. 7 is a vertical sectional view of one type of slitting andwinding machine that may be used in connection with the invention. 7

Figs. 8, 9, 10 and 11 are'views in elevation of the winding shaft,showing-the different steps involved in the method of the presentinvention. I

Referring to Figs. 4,, 5, and 6, reference .7 character 1 denotes awinding shaft having 'a longitudinal groove 2 in which clamping member3'is seated. Said clamping member is slidable longitudinally in thegroove of the shaft and is also capable of outward movement. Anysuitable means may be employed for this pur ose, but preferably member 3is provi ed with elongated, oblique cam slots 4 throughwhich projectpins 5 'fixed in the shaft. It will be undershaft 17.

stood that by moving member 3 lengthwise the cam action between the pinsand slots is such that member 3 moves outwardly beyond the outer surfaceof the shaft so that, if a tube as 6 has been placed upon the shaft,serrated edges 7 of member 3 will become imbedded in the soft interiorsurface of said tube and will hold said tube firmly in position. Aconvenient means for effectin the lengthwise movement of member 3 is ereshown in the form of threaded member 8 fitting on reduced and threadedportion 9 of the winding shaft. By rotating said member 8 in onedirection, the clamping member may be moved lengthwise in one directionand, by rotating member 8 in the other direction, gravity will restorethe clamping member to its original position. Shaft l is furtherprovided with circumferential grooves 10 that register with core cuttingelements 11 of the core cutting machine; and member 3 is provided withcut-away portions 12 that come into alinement with grooves 10 when saidmember 3 occupies its protruding position so that clearance for cuttingelements 11 may be obtained.

Normally member 3 will occupy the position shown in Fig. 8, that is,below the outer surface of the shaft. A relatively long cardboard tube 6is then mounted on the shaft and member 3 is caused to clamp said tubeasindicated diagrammatically in Fig. 9. The shaft carrying the tube isnow inserted in bearings 13 of the core cuttin machine shown in Figs. 1,2 and 3. Sai bearings are carried by rocker arms 14 swinging on center15 so that shaft 1 and tube 6 may be rocked into engagement with a setof cutters 11 carried on a rotatable Said cutters are driven from shaft15 b means of spur-gear 18 and pinion 19 an shaft 1 is also driven, butat a different speedfrom that of shaft 17, by means of spur-gears 20 and21 so as to insure every portion circumferentially of the tube beingpresented to cutters 11. Cutters 11 are spaced to match the spacing ofthe slitting elements of a slitting and winding machine, and it will nowbe understood that when shaft 1 and tube 6 are pressed against cutters16 a group of cores 30 as shown in Fig. 10 will be produced. Cutters 11may beof different constructions. Two different types are shown in Fig.6. a

Shaft 1,- with the core group in undisturbed position, is now removedfrom the core cutting machine and is mounted as the winding shaft of awinding machine. This machine may be of many different constructions. InFig. 7 is shown a vertical cross section of .a well-known typeof'Cameron winder, known as a combination winder and fully disclosed inU. S. Letters Patent No. 1,256,499. As shown in Fig. 7, the slittingelements here consist of score cut means comprising a. backing roller 31and score cutters 32. Shaft 1 with core group 30 is mounted in arms 33which rise as the material accumulates on the shaft. The material 34. tobe slitted is led over guide rollers 35 to backing roller 31' and isslitted by score cutters 32 after which the slitted sections 36 pass tocores 30 of shaft 1.

It will be understod that if cutting elements 11 of the core cuttingmachine are spaced to correspond with the transverse spacing of a numberof slitters like 32 of the slitting machine, the slitted sections ofmaterial will be led in proper register to the cores. In Fig. 11 isdisclosed diagrammatically a number of coils of wound material 36 oncores 30. The winding operation being completed, shaft 1 may nowberemoved from the winder, member 3 withdrawn from engagement-with cores30, and the coils and cores are then readily removable from the shaft.

The core supporting means are not claimed in this application but formthe subject matter of application Ser. N0. 23,706,

filed April 16, 1925. I claim:

1. The method of spacing individual cores on a winding shaft whichconsists insecuring a relatively long core member on the shaft, and thensubdividing said core member into a group of individual cores while heldon the shaft, which group is left undisturbed on the shaft.

2. The method of spacing individual cores on a winding shaft whichconsists in securing a relatively long core member on the shaft, thensubdividing said core member into 'a group of individual cores whileheld on the shaft, and then inserting the shaft, with the group of coresundisturbed, in a winding machine.

3. The m'ethod of spacing individual cores on a winding shaft whichconsists 'in spacing the cutting mechanism of a core cutting machine tocorrespond with the slitting elements of a slitting and .-windingmachine, then subdividing a relatively long core member into a group,.of' cores. while held on a winding shaft inserted in the core cuttingmachine, and then transferring the winding shaft with the group of coresundisturbed to the slitting and Winding I machine.

